<?php
class runtime
{ 
var $StartTime = 0; 
var $StopTime = 0; 

function get_microtime() 
{ 
list($usec, $sec) = explode(' ', microtime()); 
return ((float)$usec + (float)$sec); 
} 

function start() 
{ 
$this->StartTime = $this->get_microtime(); 
} 

function stop() 
{ 
$this->StopTime = $this->get_microtime(); 
} 

function spent() 
{ 
return round(($this->StopTime - $this->StartTime) * 1000, 1); 
} 

}
?>